Visitors look on Sarah Jacob, left foreground and her sister Emily Johnston from Johnstown, Pa, working on their pretzel roller coaster at Busch Gardens Europe on Thursday. Semifinalists competed in a pretzel coaster-building contest with using only pretzels and glue guns.

Visitors look on Sarah Jacob, left foreground and her sister Emily Johnston from Johnstown, Pa, working on their pretzel roller coaster at Busch Gardens Europe on Thursday. Semifinalists competed in a pretzel coaster-building contest with using only pretzels and glue guns. (Sangjib Min, Daily Press)

Joel Christopher, left, 11, and his brother Drew, 15, from Homer, N.Y., work on their pretzel roller coaster at Busch Gardens Europe on Thursday. Semifinalists competed in a pretzel coaster-building contest with using only pretzels and glue guns.

Joel Christopher, left, 11, and his brother Drew, 15, from Homer, N.Y., work on their pretzel roller coaster at Busch Gardens Europe on Thursday. Semifinalists competed in a pretzel coaster-building contest with using only pretzels and glue guns. (Sangjib Min, Daily Press)